1220101112120 has 128 divisors (see below), whose sum is σ = 3171645642240. Its totient is φ = 418048688640.

The previous prime is 1220101112071. The next prime is 1220101112137. The reversal of 1220101112120 is 212111010221.

It is a junction number, because it is equal to n+sod(n) for n = 1220101112095 and 1220101112104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221687 + ... + 1577766.

It is an arithmetic number, because the mean of its divisors is an integer number (24778481580).

Almost surely, 2^{1220101112120} is an apocalyptic number.

1220101112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220101112120 is an abundant number, since it is smaller than the sum of its proper divisors (1951544530120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220101112120 is a wasteful number, since it uses less digits than its factorization.

1220101112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799565 (or 1799561 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220101112120 its reverse (212111010221), we get a palindrome (1432212122341).

The spelling of 1220101112120 in words is "one trillion, two hundred twenty billion, one hundred one million, one hundred twelve thousand, one hundred twenty".